Make your search more relevant by using the following criteria-
Boolean
AND A AND B -Search content which contain both A and B.
For Example: chocolate AND engine
OR A OR B -Search content which contain either A or B or both.
For Example: chocolate OR engine
-A -Search content which does not contain A.
For Example: -chocolate
-ttl:chocolate
Wildcard
* A* -Search content which contain words starting with A.
For Example: choco* (returns "choco", "chocolate", "chocoholic"...)
? A? -Search for content which contain words starting with A and followed by a single character.
For Example: engine? (returns "engine", "engines", "engined")
Fuzzy
~ A~ -Search for content with similar spelling for A.
For Example: roam~ (returns "roam", "roams", "foam")
Field Grouping
Use parentheses to group multiple clauses to a single field.
For Example: ttl:(chocolate engine)
Proximity
~N "A B"~N -Search for content which contain A within N words of B.
For Example: "chocolate engine"~5 (returns "chocolate engine", "chocolate processing engine"...)
Fielded Search
The following query terms may be used to search for a word or phrase within a specific patent field:
ttl: -Title
ab: -Abstract
desc: -Description
clm: -Claims
aclm: -Ammended Claims
pa: -Applicant/Assignee
inv: -Inventor
ad: -Application Date (yyyyMMdd)
adyear: -Application Year
fam: -Family ID
pd: -Publication Date (yyyyMMdd)
pdyear: -Publication Year
pri: -Priority Identifier
prictry: -Priority Country
prinum: -Priority Number
prikind: -Priority Kind
prid: -Priority Date (yyyyMMdd)
pn: -Publication Identifier
pnctry: -Publication Country
pnnum: -Publication Number
pnkind: -Publication Kind
an: -Application Identifier
annum: -Application Number
anctry: -Application Country
ankind: -Application Kind
ecla: -ECLA Classifications
cpc: -CP Classification
asg: -Assignee
asgstd: -Assignee Standard
asgname: -Assignee Original
agt: -Agent
agtstd: -Agent Standard
agtname: -Agent Original
ex: -Examiner
exp: -Examiner Primary
exa: -Examiner Assist
pctad: -PCT Application Date
pctadyear: -PCT Application Year
ls: -Legal Status Event
lsctry: -Legal Status Event Country
lscode: -Legal Status Event Code
lsdate: -Legal Status Event Date
lsdateyear: -Legal Status Event Year
ds: -Designated States
pcit: -Patent Citation
pcitpn: -Patent Citation Publication Identifier
pcitpnctry: -Patent Citation Publication Country
pcitpnnum: -Patent Citation Publication Number
pcitpnkind: -Patent Citation Publication Kind
pcitsrc: -Patent Citation Source
For Example: ttl:chocolate